/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class IsUniqueByExampleElementGenerator extends AbstractXmlElementGenerator {

	public IsUniqueByExampleElementGenerator() {
		super();
	}

	@Override
	public void addElements(XmlElement parentElement) {
		XmlElement answer = new XmlElement("select"); //$NON-NLS-1$

		String packageName = introspectedTable.getExampleType();
		if (packageName != null && packageName.lastIndexOf(".po.") != -1) {
			packageName = packageName.replace(".po.", ".qo.");
		}
		//packageName += "Qo";
		packageName = util.StringUtils.replaceLast(packageName,"Po","Qo");

		answer.addAttribute(new Attribute("id", introspectedTable.getIsUniqueByExampleStatementId())); //$NON-NLS-1$
		answer.addAttribute(new Attribute("parameterType", packageName)); //$NON-NLS-1$
		answer.addAttribute(new Attribute("resultType", "java.lang.Integer")); //$NON-NLS-1$ //$NON-NLS-2$

		context.getCommentGenerator().addComment(answer);

		StringBuilder sb = new StringBuilder();
		sb.append("select count(*) from "); //$NON-NLS-1$
		sb.append(introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime());
		answer.addElement(new TextElement(sb.toString()));
		
		
		XmlElement foreachElement = new XmlElement("trim"); //$NON-NLS-1$
		foreachElement.addAttribute(new Attribute("prefix", "where"));
		foreachElement.addAttribute(new Attribute("prefixOverrides", "and|or"));
		
		StringBuilder qo = new StringBuilder();
		qo.append("<if test=\"qo.name != null and qo.name != ''\"> and name = #{qo.name} </if>"); //$NON-NLS-1$
		qo.append("<if test=\"qo.id != null\">and id != #{qo.id}	</if> "); //$NON-NLS-1$
		foreachElement.addElement(new TextElement(qo.toString())); //$NON-NLS-1$
		answer.addElement(foreachElement);

		if (context.getPlugins().sqlMapCountByExampleElementGenerated(answer, introspectedTable)) {
			parentElement.addElement(answer);
		}
	}
}
